comb

by ganeshie8

JavaScript

function permutator(inputArr) {
  var results = [];

  function permute(arr, memo) {
    var cur, memo = memo || [];

    for (var i = 0; i < arr.length; i++) {
      cur = arr.splice(i, 1);
      if (arr.length === 0) {
        results.push(memo.concat(cur));
      }
      permute(arr.slice(), memo.concat(cur));
      arr.splice(i, 0, cur[0]);
    }
 
    return results;
  }

    return permute(inputArr);
}

var set=[1,2,3,4,5,6,7,8,9];
var good=[];
var numbers = permutator(set);
var c=0;
for(var i=0;i<numbers.length;i++) {
    var test=1;
    for(j=0;j<4;j++){
        if(Math.abs(numbers[i][j] - numbers[i][8-j]) !== 1) {
            test=0;
        }
    }
    if(test==1) {c++;good.push(numbers[i]); $("body").append(c+": "+numbers[i].join("")+"<br />")}
}

//$("body").append(good[0])